Automatic firearm.



L. SCHMBISSER. AUTOMATIC PIREARM.

APPLIGATION FILED $111,117, 1910.

989,432. 1 Patented Apr. 11, 1911.

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LOUIS SCHMEISSER, 0F ERFURT, GERMANY.

AUTOMATIC FIREARM.

To all whom it may concern:

Be it known that I, Louis SoHMnIssnn, engineer, a subject of the German Emperor, residing at 8 Strassburgerstrasse, Erfurt, Germany, have invented certain new and useful Improvements in Automatic Firearms; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as will enable others v skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in automatic vtire arms, and more particularly to automatic tire arms with stationary barrel. And the object of the improvements is to provide a fire arm of this class in which the parts which must be dismounted for thoroughly cleaning the firearm can easily be mounted or dismounted by hand. For this purpose a slidable or otherwise movable locking bar is provided, at the upper part of the firearm which enables the barrel to be easily secured or dismounted.

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawing in which the same letters of reference have been used in all the views to indicate corresponding parts.

In said drawing Figure lis a vertical longitudinal section of the forward and upper part of a pistol of this class, the parts being shown in the closed position of the pistol, Fig. 2 is a cross-section of the pistol taken on the line A-B of Fig. 1, Fig. 8, is a Jfront view of the pistol, Fig. 4 is a vertical longitudinal section of the tore upper part of the pistol, the breech block being withdrawn, Fig. 5 is a cross-section of the pistol taken on the line C D of Fig. 4, Fig. 6 is a top view of the pistol in the closed position, Fig. 7 is a side view of the breech block seen from the left, Fig. 8 is a front view of the same, Fig. 9, is a top view of the same, Fig. 10 is a side view of the barrel seen from the left, and Fig. 11 is a front view of the barrel.

Referring to the example illustrated in the drawing, the breech block B is slidably supported within and' has an interlocking engagement with the receiver A within which it can be shifted in a longitudinal direction. A stud c of the barrel C is fitted in a notch of the receiver (Figs. 1, 4 and 5). The barrel C and the breech block B are Specification of Letters Patent.

Application filed September 7, 1910.

Patented Apr. 11, 1911. serial No. 580,891.

provided over their whole lengths with grooves providing a seat for a slide bar D. Below the barrel a closing spring F is provided which with its rear end bears against a relatively stationary part of the receiver and with its front end against a stud b1 projecting downward from the breech block B. The said spring is guided ony a pin G. When the spring F has been placed into the receiver A, and the breech block B is pushed backward on the receiver A a suliicient distance, the barrel C with its stud c can be placed into the receiver A. The forward movement of the breech block B under the action of the spring F is limited by con tact with the barrel, while the rearward movement of the said block is arrested by the stud b1 striking against a relatively stationary part of the receiver.

l/Vhen the slide bar D has been pushed into its seat formed by the grooves of the breech block B and the barrel C, the barrel which before was prevented only from being displaced longitudinally and laterally, is locked against upward displacement. `When using the pistol the slide bar D is locked against displacement by means of the sight E which has a rocking support on bar D. A spring el tends to force a pin e of the said sight into a recess Z) of the breech block B, as soon as the slide bar D has arrived in its proper position, as is shown in Figs. 1, 3 and 4. The slide bar D may also carry the front sight.

As shown in Fig. 4, when shifting the breech block B backward an aperture is formed through which the cartridges can be thrown out laterally.

The parts of the pistol are dismounted by raising the sight E, and shifting the slide D backward suliiciently to enable the barrel C to be removed from the stock in an upward direction; Now the breech block B, its spring F, and the guide pin G of the latter can be removed from the stock by shifting the same forward.

Having now particularly described and ascertained the nature of my said invention and in .what manner the same is to be performed, I declare that what I claim is:

1. In automatic firearms, the combination with the stock, the barrel, and the breech block, said barrel and breech block being formed with registering guideways, of a stud projecting downward from said barrel and iitting in a notch of the stock, and a slide bar seated within the guideways of said breech block and barrel.

2. In automatic irearms, the combination with the stock, the barrel, and the breech' block, said barrel and breech block being formed with registering guideways, of a stud projecting downward from said barrel and iitting in a notch of the stock, a` slide bar seated within the guideways of said breech block and barrel, and means to lock said slide bar on the breech block.

3.' In automatic firearms, the combination with the stock, the barrel, and the breech block, said barrel and breech block being formed with registering guideways, of a stud projecting downward from said barrel and iitting in a notch of the stock, a slide bar seated within the gnideways of said breech block and barrel, a spring pressed rear sight having a rocking support on said slide bar, and means connected with said rear sight to lock said slide bar on the breech block.

4. In automatic firearms, the combination with a stock, of a removable barrel, a breech block interlocked to and slidable on the stock, said barrel and breech block having registering guideways, a slide fitted in said guideways, and means det-achably locking said slide.

5. In automatic firearms, the combination with a stock, of a removable barrel, abreech block interlocked to and slidable on the stock, said barrel and breech block having registering guideways, a slide fitted in said guideways, and means detachably locking said slide to the breech block.

6. In automatic firearms, the combination with a stock, of a removable barrel, a breech block interlocked to and slidable on the stock, said barrel and breech block having registering guideways, a slide fitted in said guideways, a projection carried b v said slide for entering a recess in said breech block, and yielding means for holding said projection in said recess;

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

LOUIS SCHMEISSER.

fitnesses IVOLDEMAR HAUPT, ARTHUR SGHROEDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

